#include <Arduino.h>

#define LED 12
/**
 * 第一个LED 点亮demo,闪烁
 */
void setup()
{
  // put your setup code here, to run once:
  pinMode(LED, OUTPUT);
}

void loop()
{
  digitalWrite(LED, HIGH);
  delay(100);
  digitalWrite(LED, LOW);
  delay(100);
}
